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x86/split_lock: Don't warn about unknown split_lock_detect parameter

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The split_lock_detect command line parameter is handled in sld_setup() shortly
after cpu_parse_early_param() but still before parse_early_param().

Add a dummy parsing function so that parse_early_param() doesn't later
complain about the "unknown" parameter split_lock_detect=, and pass it along
to init.

  [ bp: Massage commit message. ]

Signed-off-by: Ronan Pigott <ronan@rjp.ie>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260405181807.3906-1-ronan@rjp.ie
This commit is contained in:
Ronan Pigott
2026-04-05 10:28:25 -07:00
committed by Borislav Petkov (AMD)
parent f44cc3a48a
commit fbe80bd699
1 changed files with 6 additions and 0 deletions
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6
arch/x86/kernel/cpu/bus_lock.c
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@@ -132,6 +132,12 @@ static void __init sld_state_setup(void)
sld_state = state;
}
static __init int setup_split_lock_detect(char *arg)
{
return 1;
}
__setup("split_lock_detect=", setup_split_lock_detect);
static void __init __split_lock_setup(void)
{
if (!split_lock_verify_msr(false)) {